Classifier for milled products



Aug. 26. 1924. 1,506,494 L. LlNDSAY CLASSIFIEE FOR MILLED PRODUCTS Filed Oct. G. 1921 sessies nag. 2e, i924. p l,50l@,494

UNITED STATES PATENT OFFICE.

LYGUBG'US LINDSAY, QF LQS ANGELES, CALIFORNIA.

CLASSIFIEB FOR MILLE!) PRODUCTS.

Application :filed October 6, 1921. Serial No. 505,774.

T all 'io/wm t may concern.' roller 14, that is provided on its periphery Be it known that I, LroUnGUs LINDSAY, with a series of radially disposed blades 15. a citizen of the United States, residing at Feed roller 14 may be driven in any suit- Los Angeles, in the county of Los Angeles able manner, preferably by means of a belt and State of California, have invented new 16 that operates around a pulley 17, that is and useful Improvements in Classiiiers for located at the end of the shaft that carries Milled Products, of which the following is saida roller. The side wall of the box 13 a specication. over which the material to be separated and My invention relates to a classifier for Classified is discharged by the roller 14, is milled products, the principal objects of my provided with a vertically adjustable plate invention being to `generally improve upon 18, that is raised or lowered according to and simplify the construction of the eXistthe character of the material that is being ing forms of similar types of classifiers, to separated and classified in the machine. provide an apparatus of the character re- Formed in the end wall 11 immediately ferred to, that is of relatively simple strucopposite to this adjustable plate, is an openi UI ture capable of being easily and economiing 19 in which is located a section 20 of cally operated, and which will be very effecglass 0r like transparent material, and tive in separating pulver-ized or powdered through which the discharge of material material into different grades or classes. over the upper edge of adjustable plate 18 7 A further object of my invention is to may be observed. provide a classifier or separator for milled Arranged within the chamber in the chute products and pulverized material that has a or body of the classiiier and to one side of number of readily adjustable parts, thereby the medial line thereof, is a series of inenabling the material that passes through cliiied partitions 21, the lower one of which W the apparatus to be very accurately sepaforms a portion of the bottom of the chute, rated into different grades or classes. and formed in the end wall 11, immediately lVith the foregoing and otherobjects in above the lower end of each partition is a view, my invention consists in certain novel graded material Outlet opening 22, that is features of construction and arrangements normally closed by an outwardly opening S5 of parts that will be hereinafter more fully gravity gate or door 23, the same being described and claimed and illustrated in the hinged or pivoted to the end wall oi the accompanying drawings, in which: chute immediately above the outlet opening. Fig. 1 is a side elevational view of a Leading from the chamber above the inclassifier of my improved construction. clined partitions 21 are separate educts or HU Fig. 2 is a vertical section taken on a mebranch pipes 24, the same being connected dial line through the body of the classifier. to a main suction pipe 25, and which latter F ig. 3 is an enlarged detail section taken leads to the intake side of a suitably located in a vertical plane at right angles to the Suction fan 26. Extending downwardly plane of Figs. 1 and 2. and away from the upper ends of the in- 95 F ig. 4 is an elevational view looking in clined partitions 21, are inclined partitions the direction indicated by the arrow 4 in 27, the lower one of which c operates with 'Fig Q the lowermost partitions 21 in forming the .Referring by numerals to the accompanyH bottom for the chute, and the upper inclined ing drawings which illustrate a practical partitions terminate in a vertical plane a 10o embodiment of my invention, 10ml() desigshort distance away from the adjacent end nate side walls, and 11--11 the end walls of wall ll. The inclined partitions 27 are a vertically disposed Chute or hollow body located in that portion of the chamber withthrough which the material to be classified in the chute that is below the feed box 13 passes, and arranged inthe upper end of and the adjustable plate 18. said chute is a hopper 12 into which the pul- Journalled in the side walls 10 of the verized material to be classified is delivered. chute, and located between the upper end vArranged immediately below and to one of the inclined partitions 21 and 27, are side of the discharge opening at the lower transversely disposed shafts 28, each of end of hopper 12, and extending between the which carries a vane or deflector plate 29. side walls 10, is a material feeding box 13, Secured to the outer end of each shaft 2S in which is arranged for rotation, a ,feed is a segmental plate 30,11% Wlh.- is folmd.

- adjusted positions. Depending arcuate slot 33, and

an arcuate slot 31 that is concentric with the axis of shaft 28, and seated in the ad.- jacent side wall of the chute is a pin or bolt 32 that passes through said slot 31, and receives the winged nutv 33.

The construction just described provides means for retaining the vanes 29 in their feed box 13 and from points between the upper ends ot the inclined partitions 21 and 27, are vertically disposed partitions 34j, against which the free ends oi thevanes 29 are adapted to. engage when moved into vertical positions. The partitions 3ft thus serveas stops, while also controlling the movements of air within my classiiier. n

Journalled in the side walls 10, adjacent to the end `wall 11, that isf provided with the opening 19, are transversely disposed shafts 35, each or' which carries a vane 36 and which latter projects inwardly and downwardly toward the adjacent vane 29, t cooperate therewith in providing a regnlable opening below the discharge blade 18 of. the Jeed'box i The outer endl. of eaclr shaft carries a segmental' plate 37.y in which is formed an seated` in the adjacent 39 that passes through side wall 10, is a pin winged said arcuate slot and receives a nut 40.

The construction just describedprovides simple meansior adjusting the positions oi* the vanes 36 and' for locking the same after adjustment. Formed; in the end wall 11, immediately beneath each vane 39, is an air inlet opening 41, andi; hinged to the outer face of the end wall directly above each opening, is an adjustable door 42 carrying.v a section. Ll2a of transparent material such` as glass, and. which'arrangement permits inspection of the angular positions of the vanes 29 fandf 36, andlikewise inspection of the action of the-materiahy passing between the ends oi said vanes.

Projectingoutwardly from the end ot each door 4:1 is a threaded pin 43 that passes the slot inl a pivotally mounted link 44:, and. said threaded pin, receives a winged untel-5 andl which latter when tight.- ened, locks; the door yin open or closed or any. ydesired position;

Extending ini'vardl'y 'fromv the end wall 11, that is provided'with the air inlet open# ings 41', and downwardly 'towards the -lower ends of.` partitions 2 7, are inclined partitions 4-6, to the lower ends ot which are hinged gravity gates 47, the lower portions of which normally lie against the lower ends of partitions 27.

1n the operation of my. improved classifier, the material to be graded or classiiied is delivered vinto hopper. 12, from whence saidmaterialpasses intoboxa 13, and as the eedroller 14.1.is operated,.the material will from the *n be carried downwardly through the bottom of the box and thence upwardly over the upper edge of plate 18.

Doors t2care openedto admit air to the chamber within the chute and said doors are retained in open position by tightening the various winged nuts that engage the links. ela.

As suction tan 26 is operated, a constant suction of air is produced through ythe inlet openings el, thence through thev chambers between the vanes 29 and 36, thence between the adjacent ends ot said vanes, thence through the chambers beneath the inclined partitions 2'1, and thence through branch pipes24; to main suction pipe 25.

As the pulverized or powderedA material passes downwardly through the chute, the relatively lighter particles of said material will be carried by the air upwardly through the spaces between the vanes 29 and@ 36, and by the arrangement of the pairs ot inclined partitions 21 and 27' directly above each other, the particles ot material ot different specific gravities will loev separated and will iinally pass into the lower por-tions of the chambers immediately above the inclined partitions 21,. and said: separatedi on graded material will be discharged vfrom said chambers outwardly through openings 22,V past the gates or doors 23.

Obviously the. particles of material of least weight will accumulate in the chamber above the uppermost partition: 21, the relatively heavien particlesof materiall will4 accumulate in. the chamber above the'v intermediate partition 2.1-, the thirdf grade5-or still heavierparticles ol material;I will accumulate ink the chamber above the lowermost! parti.- tioin21, while tihe heaviest. particleswofi material or those 'not a'lf'eotedby'thesuctionof air drawn through. the chute;` will accumulate im the lower portion. of@ the chamber above inclined partition. 27, Jromwhence they may be removed through a1 suitablylol cated outlet: that= isy formed immediately above the lower. end ofl said lower partie tion 27.

The positions to the openings air drawn into the l different( 41', controls the amount of the, classifying chamber at elevations', and suchy provision of thedoors L12 with respect togetherI with the adj ustability off the van'es 29 and36 is very effective' in bringing 'about an accurate separation or classification of the particles of material off dilerent specific grav-ities. l

'Ilhe classifier# oliV myv improvedf construction is relativelysiniple iin-structure, maybe very economicallyA operatedj and` is very el'ective in separating andi classifying?allliinds of pulverizedorf milledproducts;

1t willbeareadily' understoodthat minor changes inthe sii-Ze,l formE andi construction oit-'the variouspartsf off my 'improvedi classii fier, may be made and substituted for those herein shown and described, Without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

I claim as my invention:

l. In a classifier for milled products, a vertically disposed chute, a series of oppositely arranged inclined partitions Within said chute, Which partitions divide the space Within sa id chute into a series of chambers, means comprising separate educts and separate air inlets, one of these being adjustable for producing a suction of air through said chambers, and a pair of adjustable vanes located in the upper portion of some of the chambers.

2. In classifier for milled products, a vertically disposed chute, a series of inverted V-shaped partitions arranged Within said chute and dividing the space therein into a series of chambers, means comprising sepa` rate educts for producing a suction of air through each chamber, and an adjustable vane arranged above each inverted V shaped partition.

3. In a classifier' for milled products, a vertically disposed chute, a series of inverted V-shaped partitions arranged Within said chute and dividing the space therein into a series of chambers, means comprising separate educts for producing a suction of air through each chamber, and an adjustable vane projecting into each chamber from one of the Walls of the chute.

4. In a classifier for milled products, a vertically disposed chute provided in one of its side Walls with a series of adjustable air inlet openings, a series of superimposed inverted V-shaped partitions Within said chute, which partitions divide the space Within said chute into a series of separating chambers, there being an air outlet leading from each chamber, means for producing a suction of air through each chamber, and a pair of adjustable vanes located Within some of the chambers.

5. In a classifier for milled products, a vertically disposed chute provided in one of its side Walls With a series of adjustable air inlet openings, a series of superimposed inverted V-shaped partitions Within said chute, which partitions divide the space Within said chute into a series of separating chambers, there being a separate air outlet leading from each chamber, means for producing a suction of air through each chamber, a pair of adjustable vanes located Within said chamber, a material feeding box arranged in the upper portion of the chute, said box having an adjustable side Wall, means Within said box for discharging the material therefrom over said adjustable side wall, toward a regulable opening between a pair of said adjustable vanes.

6. In a classifier for milled products, a chute, a hopper in the upper portion of said chute, a feed box which receives material from said hopper, a feed roller for discharging material from said feed box, means for regulating the discharge of material from said feed box, a series of material separating chambers formed in the lower portion of said chute, and a glazed opening opposite said feed box for observing the rate of discharge therefrom to the uppermost of said chambers.

In testimony whereof I have signed my name to this specification.

L. LINDSAY. 

